| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| (function(global, utils) { |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var ArrayIndexOf; |
| var ArrayJoin; |
| var GlobalRegExp = global.RegExp; |
| var GlobalString = global.String; |
| var InternalArray = utils.InternalArray; |
| var InternalPackedArray = utils.InternalPackedArray; |
| var MakeRangeError; |
| var MakeTypeError; |
| var MaxSimple; |
| var MinSimple; |
| var matchSymbol = utils.ImportNow("match_symbol"); |
| var RegExpExecNoTests; |
| var replaceSymbol = utils.ImportNow("replace_symbol"); |
| var searchSymbol = utils.ImportNow("search_symbol"); |
| var splitSymbol = utils.ImportNow("split_symbol"); |
| |
| utils.Import(function(from) { |
| ArrayIndexOf = from.ArrayIndexOf; |
| ArrayJoin = from.ArrayJoin; |
| MakeRangeError = from.MakeRangeError; |
| MakeTypeError = from.MakeTypeError; |
| MaxSimple = from.MaxSimple; |
| MinSimple = from.MinSimple; |
| RegExpExecNoTests = from.RegExpExecNoTests; |
| }); |
| |
| //------------------------------------------------------------------- |
| |
| // ECMA-262 section 15.5.4.2 |
| function StringToString() { |
| if (!IS_STRING(this) && !IS_STRING_WRAPPER(this)) { |
| throw MakeTypeError(kNotGeneric, 'String.prototype.toString'); |
| } |
| return %_ValueOf(this); |
| } |
| |
| |
| // ECMA-262 section 15.5.4.3 |
| function StringValueOf() { |
| if (!IS_STRING(this) && !IS_STRING_WRAPPER(this)) { |
| throw MakeTypeError(kNotGeneric, 'String.prototype.valueOf'); |
| } |
| return %_ValueOf(this); |
| } |
| |
| |
| // ECMA-262, section 15.5.4.4 |
| function StringCharAtJS(pos) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.charAt"); |
| |
| var result = %_StringCharAt(this, pos); |
| if (%_IsSmi(result)) { |
| result = %_StringCharAt(TO_STRING(this), TO_INTEGER(pos)); |
| } |
| return result; |
| } |
| |
| |
| // ECMA-262 section 15.5.4.5 |
| function StringCharCodeAtJS(pos) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.charCodeAt"); |
| |
| var result = %_StringCharCodeAt(this, pos); |
| if (!%_IsSmi(result)) { |
| result = %_StringCharCodeAt(TO_STRING(this), TO_INTEGER(pos)); |
| } |
| return result; |
| } |
| |
| |
| // ECMA-262, section 15.5.4.6 |
| function StringConcat(other /* and more */) { // length == 1 |
| "use strict"; |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.concat"); |
| var s = TO_STRING(this); |
| var len = arguments.length; |
| for (var i = 0; i < len; ++i) { |
| s = s + TO_STRING(arguments[i]); |
| } |
| return s; |
| } |
| |
| |
| // ECMA-262 section 15.5.4.7 |
| function StringIndexOf(pattern, position) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.indexOf"); |
| |
| var subject = TO_STRING(this); |
| pattern = TO_STRING(pattern); |
| var index = TO_INTEGER(position); |
| if (index < 0) index = 0; |
| if (index > subject.length) index = subject.length; |
| return %StringIndexOf(subject, pattern, index); |
| } |
| |
| %FunctionSetLength(StringIndexOf, 1); |
| |
| |
| // ECMA-262 section 15.5.4.8 |
| function StringLastIndexOf(pat, pos) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.lastIndexOf"); |
| |
| var sub = TO_STRING(this); |
| var subLength = sub.length; |
| var pat = TO_STRING(pat); |
| var patLength = pat.length; |
| var index = subLength - patLength; |
| var position = TO_NUMBER(pos); |
| if (!NUMBER_IS_NAN(position)) { |
| position = TO_INTEGER(position); |
| if (position < 0) { |
| position = 0; |
| } |
| if (position + patLength < subLength) { |
| index = position; |
| } |
| } |
| if (index < 0) { |
| return -1; |
| } |
| return %StringLastIndexOf(sub, pat, index); |
| } |
| |
| %FunctionSetLength(StringLastIndexOf, 1); |
| |
| |
| // ECMA-262 section 15.5.4.9 |
| // |
| // This function is implementation specific. For now, we do not |
| // do anything locale specific. |
| function StringLocaleCompareJS(other) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.localeCompare"); |
| |
| return %StringLocaleCompare(TO_STRING(this), TO_STRING(other)); |
| } |
| |
| |
| // ES6 21.1.3.11. |
| function StringMatchJS(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.match"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var matcher = pattern[matchSymbol]; |
| if (!IS_UNDEFINED(matcher)) { |
| return %_Call(matcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| // Non-regexp argument. |
| var regexp = new GlobalRegExp(pattern); |
| return RegExpExecNoTests(regexp, subject, 0); |
| } |
| |
| |
| // ECMA-262 v6, section 21.1.3.12 |
| // |
| // For now we do nothing, as proper normalization requires big tables. |
| // If Intl is enabled, then i18n.js will override it and provide the the |
| // proper functionality. |
| function StringNormalize(formArg) { // length == 0 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.normalize"); |
| var s = TO_STRING(this); |
| |
| var form = IS_UNDEFINED(formArg) ? 'NFC' : TO_STRING(formArg); |
| |
| var NORMALIZATION_FORMS = ['NFC', 'NFD', 'NFKC', 'NFKD']; |
| var normalizationForm = %_Call(ArrayIndexOf, NORMALIZATION_FORMS, form); |
| if (normalizationForm === -1) { |
| throw MakeRangeError(kNormalizationForm, |
| %_Call(ArrayJoin, NORMALIZATION_FORMS, ', ')); |
| } |
| |
| return s; |
| } |
| |
| %FunctionSetLength(StringNormalize, 0); |
| |
| |
| // This has the same size as the RegExpLastMatchInfo array, and can be used |
| // for functions that expect that structure to be returned. It is used when |
| // the needle is a string rather than a regexp. In this case we can't update |
| // lastMatchArray without erroneously affecting the properties on the global |
| // RegExp object. |
| var reusableMatchInfo = [2, "", "", -1, -1]; |
| |
| |
| // ES6, section 21.1.3.14 |
| function StringReplace(search, replace) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.replace"); |
| |
| // Decision tree for dispatch |
| // .. regexp search (in src/js/regexp.js, RegExpReplace) |
| // .... string replace |
| // ...... non-global search |
| // ........ empty string replace |
| // ........ non-empty string replace (with $-expansion) |
| // ...... global search |
| // ........ no need to circumvent last match info override |
| // ........ need to circument last match info override |
| // .... function replace |
| // ...... global search |
| // ...... non-global search |
| // .. string search |
| // .... special case that replaces with one single character |
| // ...... function replace |
| // ...... string replace (with $-expansion) |
| |
| if (!IS_NULL_OR_UNDEFINED(search)) { |
| var replacer = search[replaceSymbol]; |
| if (!IS_UNDEFINED(replacer)) { |
| return %_Call(replacer, search, this, replace); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| search = TO_STRING(search); |
| |
| if (search.length == 1 && |
| subject.length > 0xFF && |
| IS_STRING(replace) && |
| %StringIndexOf(replace, '$', 0) < 0) { |
| // Searching by traversing a cons string tree and replace with cons of |
| // slices works only when the replaced string is a single character, being |
| // replaced by a simple string and only pays off for long strings. |
| return %StringReplaceOneCharWithString(subject, search, replace); |
| } |
| var start = %StringIndexOf(subject, search, 0); |
| if (start < 0) return subject; |
| var end = start + search.length; |
| |
| var result = %_SubString(subject, 0, start); |
| |
| // Compute the string to replace with. |
| if (IS_CALLABLE(replace)) { |
| result += replace(search, start, subject); |
| } else { |
| reusableMatchInfo[CAPTURE0] = start; |
| reusableMatchInfo[CAPTURE1] = end; |
| result = ExpandReplacement(TO_STRING(replace), |
| subject, |
| reusableMatchInfo, |
| result); |
| } |
| |
| return result + %_SubString(subject, end, subject.length); |
| } |
| |
| |
| // Expand the $-expressions in the string and return a new string with |
| // the result. |
| function ExpandReplacement(string, subject, matchInfo, result) { |
| var length = string.length; |
| var next = %StringIndexOf(string, '$', 0); |
| if (next < 0) { |
| if (length > 0) result += string; |
| return result; |
| } |
| |
| if (next > 0) result += %_SubString(string, 0, next); |
| |
| while (true) { |
| var expansion = '$'; |
| var position = next + 1; |
| if (position < length) { |
| var peek = %_StringCharCodeAt(string, position); |
| if (peek == 36) { // $$ |
| ++position; |
| result += '$'; |
| } else if (peek == 38) { // $& - match |
| ++position; |
| result += |
| %_SubString(subject, matchInfo[CAPTURE0], matchInfo[CAPTURE1]); |
| } else if (peek == 96) { // $` - prefix |
| ++position; |
| result += %_SubString(subject, 0, matchInfo[CAPTURE0]); |
| } else if (peek == 39) { // $' - suffix |
| ++position; |
| result += %_SubString(subject, matchInfo[CAPTURE1], subject.length); |
| } else if (peek >= 48 && peek <= 57) { |
| // Valid indices are $1 .. $9, $01 .. $09 and $10 .. $99 |
| var scaled_index = (peek - 48) << 1; |
| var advance = 1; |
| var number_of_captures = NUMBER_OF_CAPTURES(matchInfo); |
| if (position + 1 < string.length) { |
| var next = %_StringCharCodeAt(string, position + 1); |
| if (next >= 48 && next <= 57) { |
| var new_scaled_index = scaled_index * 10 + ((next - 48) << 1); |
| if (new_scaled_index < number_of_captures) { |
| scaled_index = new_scaled_index; |
| advance = 2; |
| } |
| } |
| } |
| if (scaled_index != 0 && scaled_index < number_of_captures) { |
| var start = matchInfo[CAPTURE(scaled_index)]; |
| if (start >= 0) { |
| result += |
| %_SubString(subject, start, matchInfo[CAPTURE(scaled_index + 1)]); |
| } |
| position += advance; |
| } else { |
| result += '$'; |
| } |
| } else { |
| result += '$'; |
| } |
| } else { |
| result += '$'; |
| } |
| |
| // Go the the next $ in the string. |
| next = %StringIndexOf(string, '$', position); |
| |
| // Return if there are no more $ characters in the string. If we |
| // haven't reached the end, we need to append the suffix. |
| if (next < 0) { |
| if (position < length) { |
| result += %_SubString(string, position, length); |
| } |
| return result; |
| } |
| |
| // Append substring between the previous and the next $ character. |
| if (next > position) { |
| result += %_SubString(string, position, next); |
| } |
| } |
| return result; |
| } |
| |
| |
| // ES6 21.1.3.15. |
| function StringSearch(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.search"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var searcher = pattern[searchSymbol]; |
| if (!IS_UNDEFINED(searcher)) { |
| return %_Call(searcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| var regexp = new GlobalRegExp(pattern); |
| return %_Call(regexp[searchSymbol], regexp, subject); |
| } |
| |
| |
| // ECMA-262 section 15.5.4.13 |
| function StringSlice(start, end) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.slice"); |
| |
| var s = TO_STRING(this); |
| var s_len = s.length; |
| var start_i = TO_INTEGER(start); |
| var end_i = s_len; |
| if (!IS_UNDEFINED(end)) { |
| end_i = TO_INTEGER(end); |
| } |
| |
| if (start_i < 0) { |
| start_i += s_len; |
| if (start_i < 0) { |
| start_i = 0; |
| } |
| } else { |
| if (start_i > s_len) { |
| return ''; |
| } |
| } |
| |
| if (end_i < 0) { |
| end_i += s_len; |
| if (end_i < 0) { |
| return ''; |
| } |
| } else { |
| if (end_i > s_len) { |
| end_i = s_len; |
| } |
| } |
| |
| if (end_i <= start_i) { |
| return ''; |
| } |
| |
| return %_SubString(s, start_i, end_i); |
| } |
| |
| |
| // ES6 21.1.3.17. |
| function StringSplitJS(separator, limit) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.split"); |
| |
| if (!IS_NULL_OR_UNDEFINED(separator)) { |
| var splitter = separator[splitSymbol]; |
| if (!IS_UNDEFINED(splitter)) { |
| return %_Call(splitter, separator, this, limit); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| limit = (IS_UNDEFINED(limit)) ? kMaxUint32 : TO_UINT32(limit); |
| |
| var length = subject.length; |
| var separator_string = TO_STRING(separator); |
| |
| if (limit === 0) return []; |
| |
| // ECMA-262 says that if separator is undefined, the result should |
| // be an array of size 1 containing the entire string. |
| if (IS_UNDEFINED(separator)) return [subject]; |
| |
| var separator_length = separator_string.length; |
| |
| // If the separator string is empty then return the elements in the subject. |
| if (separator_length === 0) return %StringToArray(subject, limit); |
| |
| return %StringSplit(subject, separator_string, limit); |
| } |
| |
| |
| // ECMA-262 section 15.5.4.15 |
| function StringSubstring(start, end) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.subString"); |
| |
| var s = TO_STRING(this); |
| var s_len = s.length; |
| |
| var start_i = TO_INTEGER(start); |
| if (start_i < 0) { |
| start_i = 0; |
| } else if (start_i > s_len) { |
| start_i = s_len; |
| } |
| |
| var end_i = s_len; |
| if (!IS_UNDEFINED(end)) { |
| end_i = TO_INTEGER(end); |
| if (end_i > s_len) { |
| end_i = s_len; |
| } else { |
| if (end_i < 0) end_i = 0; |
| if (start_i > end_i) { |
| var tmp = end_i; |
| end_i = start_i; |
| start_i = tmp; |
| } |
| } |
| } |
| |
| return %_SubString(s, start_i, end_i); |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.1 |
| function StringSubstr(start, n) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.substr"); |
| |
| var s = TO_STRING(this); |
| var len; |
| |
| // Correct n: If not given, set to string length; if explicitly |
| // set to undefined, zero, or negative, returns empty string. |
| if (IS_UNDEFINED(n)) { |
| len = s.length; |
| } else { |
| len = TO_INTEGER(n); |
| if (len <= 0) return ''; |
| } |
| |
| // Correct start: If not given (or undefined), set to zero; otherwise |
| // convert to integer and handle negative case. |
| if (IS_UNDEFINED(start)) { |
| start = 0; |
| } else { |
| start = TO_INTEGER(start); |
| // If positive, and greater than or equal to the string length, |
| // return empty string. |
| if (start >= s.length) return ''; |
| // If negative and absolute value is larger than the string length, |
| // use zero. |
| if (start < 0) { |
| start += s.length; |
| if (start < 0) start = 0; |
| } |
| } |
| |
| var end = start + len; |
| if (end > s.length) end = s.length; |
| |
| return %_SubString(s, start, end); |
| } |
| |
| |
| // ECMA-262, 15.5.4.16 |
| function StringToLowerCaseJS() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLowerCase"); |
| |
| return %StringToLowerCase(TO_STRING(this)); |
| } |
| |
| |
| // ECMA-262, 15.5.4.17 |
| function StringToLocaleLowerCase() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLocaleLowerCase"); |
| |
| return %StringToLowerCase(TO_STRING(this)); |
| } |
| |
| |
| // ECMA-262, 15.5.4.18 |
| function StringToUpperCaseJS() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.toUpperCase"); |
| |
| return %StringToUpperCase(TO_STRING(this)); |
| } |
| |
| |
| // ECMA-262, 15.5.4.19 |
| function StringToLocaleUpperCase() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLocaleUpperCase"); |
| |
| return %StringToUpperCase(TO_STRING(this)); |
| } |
| |
| // ES5, 15.5.4.20 |
| function StringTrimJS() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.trim"); |
| |
| return %StringTrim(TO_STRING(this), true, true); |
| } |
| |
| function StringTrimLeft() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.trimLeft"); |
| |
| return %StringTrim(TO_STRING(this), true, false); |
| } |
| |
| function StringTrimRight() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.trimRight"); |
| |
| return %StringTrim(TO_STRING(this), false, true); |
| } |
| |
| |
| // ECMA-262, section 15.5.3.2 |
| function StringFromCharCode(_) { // length == 1 |
| "use strict"; |
| var s = ""; |
| var n = arguments.length; |
| for (var i = 0; i < n; ++i) { |
| s += %_StringCharFromCode(arguments[i] & 0xffff); |
| } |
| return s; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.2.1 |
| function HtmlEscape(str) { |
| return %_Call(StringReplace, TO_STRING(str), /"/g, """); |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.2 |
| function StringAnchor(name) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.anchor"); |
| return "<a name=\"" + HtmlEscape(name) + "\">" + TO_STRING(this) + |
| "</a>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.3 |
| function StringBig() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.big"); |
| return "<big>" + TO_STRING(this) + "</big>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.4 |
| function StringBlink() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.blink"); |
| return "<blink>" + TO_STRING(this) + "</blink>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.5 |
| function StringBold() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.bold"); |
| return "<b>" + TO_STRING(this) + "</b>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.6 |
| function StringFixed() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fixed"); |
| return "<tt>" + TO_STRING(this) + "</tt>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.7 |
| function StringFontcolor(color) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontcolor"); |
| return "<font color=\"" + HtmlEscape(color) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.8 |
| function StringFontsize(size) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontsize"); |
| return "<font size=\"" + HtmlEscape(size) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.9 |
| function StringItalics() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.italics"); |
| return "<i>" + TO_STRING(this) + "</i>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.10 |
| function StringLink(s) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.link"); |
| return "<a href=\"" + HtmlEscape(s) + "\">" + TO_STRING(this) + "</a>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.11 |
| function StringSmall() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.small"); |
| return "<small>" + TO_STRING(this) + "</small>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.12 |
| function StringStrike() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.strike"); |
| return "<strike>" + TO_STRING(this) + "</strike>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.13 |
| function StringSub() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sub"); |
| return "<sub>" + TO_STRING(this) + "</sub>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.14 |
| function StringSup() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sup"); |
| return "<sup>" + TO_STRING(this) + "</sup>"; |
| } |
| |
| // ES6, section 21.1.3.13 |
| function StringRepeat(count) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.repeat"); |
| |
| var s = TO_STRING(this); |
| var n = TO_INTEGER(count); |
| |
| if (n < 0 || n === INFINITY) throw MakeRangeError(kInvalidCountValue); |
| |
| // Early return to allow an arbitrarily-large repeat of the empty string. |
| if (s.length === 0) return ""; |
| |
| // The maximum string length is stored in a smi, so a longer repeat |
| // must result in a range error. |
| if (n > %_MaxSmi()) throw MakeRangeError(kInvalidCountValue); |
| |
| var r = ""; |
| while (true) { |
| if (n & 1) r += s; |
| n >>= 1; |
| if (n === 0) return r; |
| s += s; |
| } |
| } |
| |
| |
| // ES6 draft 04-05-14, section 21.1.3.18 |
| function StringStartsWith(searchString, position) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.startsWith"); |
| |
| var s = TO_STRING(this); |
| |
| if (IS_REGEXP(searchString)) { |
| throw MakeTypeError(kFirstArgumentNotRegExp, "String.prototype.startsWith"); |
| } |
| |
| var ss = TO_STRING(searchString); |
| var pos = TO_INTEGER(position); |
| |
| var s_len = s.length; |
| var start = MinSimple(MaxSimple(pos, 0), s_len); |
| var ss_len = ss.length; |
| if (ss_len + start > s_len) { |
| return false; |
| } |
| |
| return %_SubString(s, start, start + ss_len) === ss; |
| } |
| |
| %FunctionSetLength(StringStartsWith, 1); |
| |
| |
| // ES6 draft 04-05-14, section 21.1.3.7 |
| function StringEndsWith(searchString, position) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.endsWith"); |
| |
| var s = TO_STRING(this); |
| |
| if (IS_REGEXP(searchString)) { |
| throw MakeTypeError(kFirstArgumentNotRegExp, "String.prototype.endsWith"); |
| } |
| |
| var ss = TO_STRING(searchString); |
| var s_len = s.length; |
| var pos = !IS_UNDEFINED(position) ? TO_INTEGER(position) : s_len |
| |
| var end = MinSimple(MaxSimple(pos, 0), s_len); |
| var ss_len = ss.length; |
| var start = end - ss_len; |
| if (start < 0) { |
| return false; |
| } |
| |
| return %_SubString(s, start, start + ss_len) === ss; |
| } |
| |
| %FunctionSetLength(StringEndsWith, 1); |
| |
| |
| // ES6 draft 04-05-14, section 21.1.3.6 |
| function StringIncludes(searchString, position) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.includes"); |
| |
| var string = TO_STRING(this); |
| |
| if (IS_REGEXP(searchString)) { |
| throw MakeTypeError(kFirstArgumentNotRegExp, "String.prototype.includes"); |
| } |
| |
| searchString = TO_STRING(searchString); |
| var pos = TO_INTEGER(position); |
| |
| var stringLength = string.length; |
| if (pos < 0) pos = 0; |
| if (pos > stringLength) pos = stringLength; |
| var searchStringLength = searchString.length; |
| |
| if (searchStringLength + pos > stringLength) { |
| return false; |
| } |
| |
| return %StringIndexOf(string, searchString, pos) !== -1; |
| } |
| |
| %FunctionSetLength(StringIncludes, 1); |
| |
| |
| // ES6 Draft 05-22-2014, section 21.1.3.3 |
| function StringCodePointAt(pos) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.codePointAt"); |
| |
| var string = TO_STRING(this); |
| var size = string.length; |
| pos = TO_INTEGER(pos); |
| if (pos < 0 || pos >= size) { |
| return UNDEFINED; |
| } |
| var first = %_StringCharCodeAt(string, pos); |
| if (first < 0xD800 || first > 0xDBFF || pos + 1 == size) { |
| return first; |
| } |
| var second = %_StringCharCodeAt(string, pos + 1); |
| if (second < 0xDC00 || second > 0xDFFF) { |
| return first; |
| } |
| return (first - 0xD800) * 0x400 + second + 0x2400; |
| } |
| |
| |
| // ES6 Draft 05-22-2014, section 21.1.2.2 |
| function StringFromCodePoint(_) { // length = 1 |
| "use strict"; |
| var code; |
| var length = arguments.length; |
| var index; |
| var result = ""; |
| for (index = 0; index < length; index++) { |
| code = arguments[index]; |
| if (!%_IsSmi(code)) { |
| code = TO_NUMBER(code); |
| } |
| if (code < 0 || code > 0x10FFFF || code !== TO_INTEGER(code)) { |
| throw MakeRangeError(kInvalidCodePoint, code); |
| } |
| if (code <= 0xFFFF) { |
| result += %_StringCharFromCode(code); |
| } else { |
| code -= 0x10000; |
| result += %_StringCharFromCode((code >>> 10) & 0x3FF | 0xD800); |
| result += %_StringCharFromCode(code & 0x3FF | 0xDC00); |
| } |
| } |
| return result; |
| } |
| |
| |
| // ------------------------------------------------------------------- |
| // String methods related to templates |
| |
| // ES6 Draft 03-17-2015, section 21.1.2.4 |
| function StringRaw(callSite) { |
| "use strict"; |
| var numberOfSubstitutions = arguments.length; |
| var cooked = TO_OBJECT(callSite); |
| var raw = TO_OBJECT(cooked.raw); |
| var literalSegments = TO_LENGTH(raw.length); |
| if (literalSegments <= 0) return ""; |
| |
| var result = TO_STRING(raw[0]); |
| |
| for (var i = 1; i < literalSegments; ++i) { |
| if (i < numberOfSubstitutions) { |
| result += TO_STRING(arguments[i]); |
| } |
| result += TO_STRING(raw[i]); |
| } |
| |
| return result; |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| // Set the String function and constructor. |
| %FunctionSetPrototype(GlobalString, new GlobalString()); |
| |
| // Set up the constructor property on the String prototype object. |
| %AddNamedProperty( |
| GlobalString.prototype, "constructor", GlobalString, DONT_ENUM); |
| |
| // Set up the non-enumerable functions on the String object. |
| utils.InstallFunctions(GlobalString, DONT_ENUM, [ |
| "fromCharCode", StringFromCharCode, |
| "fromCodePoint", StringFromCodePoint, |
| "raw", StringRaw |
| ]); |
| |
| // Set up the non-enumerable functions on the String prototype object. |
| utils.InstallFunctions(GlobalString.prototype, DONT_ENUM, [ |
| "valueOf", StringValueOf, |
| "toString", StringToString, |
| "charAt", StringCharAtJS, |
| "charCodeAt", StringCharCodeAtJS, |
| "codePointAt", StringCodePointAt, |
| "concat", StringConcat, |
| "endsWith", StringEndsWith, |
| "includes", StringIncludes, |
| "indexOf", StringIndexOf, |
| "lastIndexOf", StringLastIndexOf, |
| "localeCompare", StringLocaleCompareJS, |
| "match", StringMatchJS, |
| "normalize", StringNormalize, |
| "repeat", StringRepeat, |
| "replace", StringReplace, |
| "search", StringSearch, |
| "slice", StringSlice, |
| "split", StringSplitJS, |
| "substring", StringSubstring, |
| "substr", StringSubstr, |
| "startsWith", StringStartsWith, |
| "toLowerCase", StringToLowerCaseJS, |
| "toLocaleLowerCase", StringToLocaleLowerCase, |
| "toUpperCase", StringToUpperCaseJS, |
| "toLocaleUpperCase", StringToLocaleUpperCase, |
| "trim", StringTrimJS, |
| "trimLeft", StringTrimLeft, |
| "trimRight", StringTrimRight, |
| |
| "link", StringLink, |
| "anchor", StringAnchor, |
| "fontcolor", StringFontcolor, |
| "fontsize", StringFontsize, |
| "big", StringBig, |
| "blink", StringBlink, |
| "bold", StringBold, |
| "fixed", StringFixed, |
| "italics", StringItalics, |
| "small", StringSmall, |
| "strike", StringStrike, |
| "sub", StringSub, |
| "sup", StringSup |
| ]); |
| |
| // ------------------------------------------------------------------- |
| // Exports |
| |
| utils.Export(function(to) { |
| to.ExpandReplacement = ExpandReplacement; |
| to.StringCharAt = StringCharAtJS; |
| to.StringIndexOf = StringIndexOf; |
| to.StringLastIndexOf = StringLastIndexOf; |
| to.StringMatch = StringMatchJS; |
| to.StringReplace = StringReplace; |
| to.StringSlice = StringSlice; |
| to.StringSplit = StringSplitJS; |
| to.StringSubstr = StringSubstr; |
| to.StringSubstring = StringSubstring; |
| }); |
| |
| }) |